Edge Beginners Guide

Edge

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Component Purpose
1 USB-A USB 3.0 speeds
2 USB-C USB 3.0, Display Port v1.2, with 5-20V input (USB power delivery), can be used for upgrading the OS
3 HDMI 2.0 Type-A Female, up to 4K@60Hz, HDCP 2.2
4 USB-C USB-C port with 5-20V input (USB power delivery)
5 USB-A USB 2.0 speeds
6 Fan Header 4-wire fan header utilising pulse width modulation
7 Reset Button Force reboot your Edge in the event of a system freeze
8 Function Button Press this 3 times in 2 seconds to enter MaskROM mode
9 Power Button This button turns on your Edge
A 314-Pin Gold Fingers For docking with expansion boards such as the Captain
B I-Pex Wi-Fi / Bluetooth Connector Connect Wi-Fi / Bluetooth antennas
C I-Pex Wi-Fi / Bluetooth Connector Connect Wi-Fi / Bluetooth antennas
Component Purpose
1 Li-Po Battery Connector For connecting Lithium Polymer batteries
2 Secondary Wi-Fi / Bluetooth Pad Extra pad for mounting Wi-Fi / Bluetooth antennas
3 Secondary Wi-Fi / Bluetooth Pad Extra pad for mounting Wi-Fi / Bluetooth antennas
4 M2x4 Mounting Point For mounting a heatsink or carrier board
5 FPC Connector B 10-Pins, 0.5mm Pitch, USB, I2S(8ch), I2C, MCU IOs
6 FPC Connector A 10-Pins, 0.5mm Pitch, UART, I2C, SPI, SDMMC, ADC, PWM, IOs. To add GPIO, use Edge IO
7 M-Register Allows the EMMC to enter MaskROM mode
Reset Function Power Purpose
x Force Reboot Edge
x Enter Upgrade Mode (TST)
x Power On/Wake Up Edge
x x Enter Upgrade Mode (KEYS)
Colour Behaviour Meaning
Blue OFF Power source disconnected
Solid ON Power source connected, SBC turned off
White OFF SBC turned off
Solid ON SBC turned on
Red None None

The above behaviours are default out-of-the-box, and can be altered by a user. For example the white LED can be made to blink or breathe. For more information on how to program them via your favourite OS (each OS is different), please consult with experts at forum.khadas.com.

Edge-V

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Component Purpose
1 USB-A USB 3.0, blue colour
2 RJ-45 Gigabit Ethernet with Wake-On-LAN (WOL)
3 HDMI Type-A Female, up to 4K@60Hz, HDCP 2.2
4 USB-C USB 3.0, Display Port v1.2, can be used for upgrading the OS
5 USB-A USB 2.0, black colour
6 Fan Header 4-wire fan header utilising pulse width modulation
7 Reset Button Force reboot your Edge-V in the event of a system freeze
8 Function Button Press this 3 times in 2 seconds to enter MaskROM mode
9 Power Button This button turns on your Edge-V
A RTC Battery Header Header for attaching a battery for the real time clock
B 40-Pin GPIO Learn how to access GPIO here, or use it to add a Toneboard
C Gesture Sensor Control your Edge-V with a hand-wave
D Infrared Module 2-channel infrared receiver for use with Khadas IR remote
E LEDs Status indicator LEDs
F I-Pex Wi-Fi / Bluetooth Connector Wi-Fi / BT Antenna connector
G I-Pex Wi-Fi / Bluetooth Connector Wi-Fi / BT Antenna connector
Component Purpose
1 Li-Po Battery Connector Connect a Lithium Polymer battery with the Juice Board
2 USB-C USB-C port that accepts 5-20V power input (USB power delivery)
3 Micro-SD Card Slot Boot alternative OSes via a Micro-SD card, or just for extra storage
4 M.2 Socket (PCI-E 2.1) Connect 2280 NVMe SSDS at 4-lane speed with M2X Extension
5 E-DP Display For connecting to external displays via E-DP
6 M2x4 Mounting Point For mounting to cases and heatsinks
7 Touch Panel For accepting touch-input
8 MIPI-TX MIPI-DSI header for connecting LCD screens
9 MIPI-RX For connecting to MIPI-CSI cameras
A MIPI-RX/TX Configurable, connect to MIPI-CSI cameras or MIPI-DSI displays
B M-Register Another way for entering upgrade mode
Reset Function Power Purpose
x Force Reboot Edge-V
x Enter Upgrade Mode (TST)
x Power On/Wake Up Edge-V
x x Enter Upgrade Mode (KEYS)
Colour Behaviour Meaning
Blue OFF Power source disconnected
Solid ON Power source connected, SBC turned off
White OFF SBC turned off
Solid ON SBC turned on
Red None None

The above behaviours are default out-of-the-box, and can be altered by a user. For example the white LED can be made to blink or breathe. For more information on how to program them via your favourite OS (each OS is different), please consult with experts at forum.khadas.com.

SIGNAL PIN PIN SIGNAL
5V 1 21 GND
5V 2 22 SPI3_RXD/I2C0_SCK/GPIO1_C0
HOST1_DM 3 23 SPI3_TXD/I2C0_SDA/GPIO1_B7
HOST1_DP 4 24 GND
GND 5 25 I2C2_SCL/GPIO2_A1
MCU_TX 6 26 I2C2_SDA/GPIO2_A0
MCU_NRST 7 27 3.3V
MCU_SWIM 8 28 GND
GND 9 29 I2S0_SCLK/GPIO3_D0
ADC_IN2 10 30 I2S_CLK/GPIO4_A0
1.8V 11 31 I2S0_SDO0/GPIO3_D7
ADC_IN3 12 32 2S0_LRCK_TX/GPIO3_D2
SPDIF/GPIO3_C0 13 33 I2S0_SDI0/GPIO3_D3
GND 14 34 GND
SPI3_CS/GPIO1_C2 15 35 I2S0_SDI3SDO1/GPIO3_D6
SPI3_CLK/GPIO1_C1 16 36 2S0_SDI2SDO2/GPIO3_D5
GND 17 37 I2S0_SDI1SDO3/GPIO3_D4
Linux_RX 18 38 I2S0_LRCK_RX/GPIO3_D1
Linux_TX 19 39 MCU_PA1
3.3V 20 40 GND

Captain

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Component Purpose
1 RK3399 SoC Heat Spreader Metallic layer for reducing heat concentration
2 RJ-45 Gigabit Ethernet port with Wake-On-LAN (WOL)
3 40-Pin GPIO Learn how to access the GPIO here
4 RTC Header For connecting an external button battery for the real-time clock
5 Reset Button Forcefully reboot Edge+Captain if your system freezes
6 12V DC Barrel Jack Alternative 12V DC power input, see power priority
7 Micro-SD Card Slot Boot additional OSes via Micro-SD, or just for extra storage
8 Buzzer Produces simple sounds
9 Gesture Sensor Control your Edge+Captain with a hand-wave
A IR Receiver 2-channel infrared module, for use with the Khadas IR remote
B Right Game Pad For games, use with the Kap Case
C Left Game Pad For games, use with the Kap Case
D USIC Legacy USB-bus, unpopular
E E-DP Display For connecting to external displays via E-DP
F Touch Panel For accepting touch-input
G MIPI-TX MIPI-DSI header for connecting LCD screens
H MIPI-RX/TX Configurable MIPI-CSI/DSI header
I MIPI-RX For connecting to MIPI-CSI cameras
J 3.5mm Audio Jack Audio output, works with the Kap Case
K Function Button For entering upgrade mode
L Microphone Audio input
M MXM3 Connector For docking with the Edge
N Wi-Fi / Bluetooth Chip Antenna Wi-Fi and BT antenna
O Wi-Fi / Bluetooth Chip Antenna Wi-Fi and BT antenna
P M3 Clearance Hole For mounting and cases, such as the Kap Case
Q M2 Threaded Stand-Off For mounting the Edge
Component Purpose
1 M.2 Socket (PCI-E 2.1) Connect directly to 2280 NVMe SSDs
2 External Speaker & DMIC Input FPC Connector Connecting to an external speaker
3 M.2 2280 Stand-Off (M2 Threaded) Boss for securing an SSD to the Captain
4 Lithium Polymer Battery Connector Add a 2-Cell Li-Po battery for portable usage, see power priority
5 Right Function Button User programmable button
6 Left Function Button User programmable button
Reset Function Left Gamepad Right Gamepad Left Function Right Function Purpose
x Force reboot Edge+Captain if the system freezes
x Enter Upgrade Mode (TST)
x User programmable button
x User programmable button
x User programmable button
x User programmable button
Colour Behaviour Meaning
Blue OFF Power source disconnected
Solid ON Power source connected, SBC turned off
White OFF SBC turned off
Solid ON SBC turned on
Red None None

The above behaviours are default out-of-the-box, and can be altered by a user. For example the white LED can be made to blink or breathe. For more information on how to program them via your favourite OS (each OS is different), please consult with experts at forum.khadas.com.

SIGNAL PIN PIN SIGNAL
5V 1 21 GND
5V 2 22 SPI3_RXD/I2C0_SCK/GPIO1_C0
HOST1_DM 3 23 SPI3_TXD/I2C0_SDA/GPIO1_B7
HOST1_DP 4 24 GND
GND 5 25 I2C2_SCL/GPIO2_A1
MCU_TX 6 26 I2C2_SDA/GPIO2_A0
MCU_NRST 7 27 3.3V
MCU_SWIM 8 28 GND
GND 9 29 I2S0_SCLK/GPIO3_D0
ADC_IN2 10 30 I2S_CLK/GPIO4_A0
1.8V 11 31 I2S0_SDO0/GPIO3_D7
ADC_IN3 12 32 2S0_LRCK_TX/GPIO3_D2
SPDIF/GPIO3_C0 13 33 I2S0_SDI0/GPIO3_D3
GND 14 34 GND
SPI3_CS/GPIO1_C2 15 35 I2S0_SDI3SDO1/GPIO3_D6
SPI3_CLK/GPIO1_C1 16 36 2S0_SDI2SDO2/GPIO3_D5
GND 17 37 I2S0_SDI1SDO3/GPIO3_D4
Linux_RX 18 38 I2S0_LRCK_RX/GPIO3_D1
Linux_TX 19 39 MCU_PA1
3.3V 20 40 GND

Captain + Edge

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Edge Power Supply

Although your Edge SBC is compatible with various types of power supplies, these are the recommended specs for the best performance-output and stability.

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  1. Khadas USB-C 24W Power Adapter (USB Power Delivery)
  2. Khadas USB-C Cable (Male-to-Male)
Tip

These items are now available at Khadas Shop

Learn More:

Displays & User Input

These items are useful when you need to connect your Edge SBC to an external display + keyboard mouse + remote control, for use as a desktop computer or media center. Edge series SBCs have USB-C display-port capability, which allows them to connect directly to Type-C enabled 4K monitors, to exchange power, data, video, and audio over a single cable.

  1. 4K HDMI 2.0 Cable
  2. HDMI-Compatible 1080P/4K Monitor w/ USB Type-C
  3. Wireless USB Keyboard + Mouse
  4. CEC-Compatible Remote Control

Learn More:

Note

Please do not attach multiple cables with large heads that interfere with each other, as that may bend or twist the connectors, and this will cause intermittent connectivity issues after some time.

Making Bootable / Burning SD-Cards / Thumbdrives

These items are useful when you want to upgrade your Edge SBC’s operating system via SD-Card or Thumbdrive (Burning Cards). Or if you want to run operating systems that can only be run from external media (Booting Cards) like LibreELEC.

  1. 8GB or Larger, SD-Card
  2. SD-Card Reader
  3. Laptop / Desktop PC
  4. 8GB or Larger, USB-Thumbdrive (U-Disk)

Learn More:

Tip
  • eMMC image should be burned directly to the eMMC using a USB-C data cable, from a Ubuntu or Windows Host. It must not be burned into an SD-Card. For Example: Android and Ubuntu distributions containing the EMMC mark.
  • SD/USB image should be copied into an SD-Card, before that card is then used to reformat the eMMC storage with a new OS. For Example: Armbian, Ubuntu distributions containing the SD_USB mark, as well as LibreELEC and CoreELEC.
  • In order to bootup from SD/USB images, you need Android (V180209 or newer) or Ubuntu (V180531 or newer) running on your eMMC with Multi-Boot activated.

Upgrading eMMC Operating System Using USB-C Cable

You’ll need these items if you want to use your laptop or desktop PC to upgrade your Edge SBC’s operating system stored in its eMMC storage. For example, changing the bootup operating system from Android to Ubuntu, or installing a more exotic 3rd-party OS.

  1. USB-A to USB-C Data Cable (Legacy Computers)
  2. USB-C to USB-C Data Cable (Modern Computers)
  3. Laptop / Desktop PC

Learn More:

Firmware Images:

Watching Movies, Expanding Internal eMMC Storage

These items are useful if you wish to use your Edge-V or Edge+Captain SBC as a media center, for storing/downloading large movie files. A microSDXC UHS-I card is expensive, but its also fast enough for 4K video playback. An external NVMe M.2 socket SSD will also be large enough to contain your entire media library.

  1. NVMe PCIe M.2 2280 SSD
  2. microSDXC UHS-I SD-Card

Learn More:

Software Development / Advanced Crash Recovery

Edge series SBCs are equipped with “Terry’s Smart Tweezers” for crash recovery without the need for conductive metal tweezers, even when the bootloader is damaged. Extreme cases of crash-recovery will require you to use the MRegister to reset your Edge SBC. A USB Serial Debug Tool is also useful for developers debugging complex software issues.

  1. Your Fingers (For resetting a dead SBC via Terry’s Smart Tweezers)
  2. Conductive Metal Tweezers (For resetting a dead SBC via MRegister)
  3. USB Serial Debug Tool (For diagnosing software/hardware issues)

Learn More:

Edge Website

For more information, please see our website, read more documentation, or visit our forum.

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